New Jersey can assess a late-filing penalty of 5% of the unpaid tax for each month or part of a month a Sales and Use Tax return is late, capped at 25%. The Division of Taxation also imposes a $100 penalty for each month or part of a month the return is delinquent. If tax is paid after the original due date, a separate 5% late-payment penalty may be imposed, and interest accrues on the unpaid balance from the original due date until payment.
For most registered sellers, New Jersey quarterly Sales Tax returns are due on the 20th day of the month after the quarter ends. There is no extra grace period after filing: payment is due with the return, by that same deadline. Sellers that collected more than $30,000 in New Jersey Sales and Use Tax in the prior calendar year can also have monthly ST-51 remittance requirements for the first and second months of each quarter when the month’s tax due exceeds $500.
For an Amazon, Shopify, Etsy, or Walmart seller, the practical priority is to file every required return on time—including a zero return where appropriate—and pay the full reported balance by the due date. A missed filing can create stacking penalties, interest, notices, and collection activity. If a penalty has been assessed, New Jersey may waive some or all of it when you establish reasonable cause, but relief is not automatic.
Key takeaways
- New Jersey late Sales Tax filing can trigger a 5% monthly penalty, capped at 25%, plus a $100 charge for each late month or part month.
- A 5% late-payment penalty may apply when tax is paid after the original due date; interest accrues separately.
- File and pay by the 20th day of the month after the applicable filing period—there is no separate period to pay after filing.
- Registered sellers should file zero ST-50 returns when required; a late zero return can still produce the $100 monthly delinquent-return penalty.
- Sellers that collected more than $30,000 in New Jersey Sales and Use Tax in the prior year may need monthly ST-51 remittances when a covered month’s tax due exceeds $500.
New Jersey late sales tax penalties at a glance
New Jersey treats filing late and paying late as separate compliance failures. That distinction matters. Filing a return without payment does not stop charges from accruing on the unpaid tax, and paying without filing does not remove the delinquent-return problem. The New Jersey Division of Taxation can assess both the late-filing and late-payment penalties when the facts support them.
The late-filing penalty is 5% per month, or part of a month, of the tax liability balance due on the original return due date. It cannot exceed 25% of that tax liability. In addition, New Jersey imposes a $100 penalty for each month or part of a month that the return is late. The late-payment penalty is 5% of the outstanding tax balance paid after the original due date and may be imposed.
Interest is separate from penalties. The Division charges interest for every month or part of a month that tax remains unpaid, beginning on the original due date and continuing until payment. A seller that waits to address a missed return may therefore see tax, penalties, and interest all appearing on the account balance.
When New Jersey Sales Tax returns and payments are due
New Jersey generally requires registered sellers to file Form ST-50, the quarterly Sales and Use Tax return, by the 20th day of the month after the filing period ends. For example, a fourth-quarter return is due January 20. When the due date falls on a Saturday, Sunday, or legal holiday, the due date moves to the next business day. Electronic quarterly returns and monthly remittance statements transmitted by 11:59 p.m. on the due date are timely under the Division’s filing guidance.
Payment is due at the same time as the return. In other words, you do not receive a separate period after filing to pay New Jersey Sales Tax. If you file on time but make the payment after the original due date, New Jersey can impose the late-payment penalty and interest on the balance paid late.
Marketplace sales need careful review. A marketplace facilitator may collect and remit tax on qualifying marketplace transactions, but that does not automatically answer whether you have a separate registration, filing, or payment obligation for direct website sales and other activity. Reconcile marketplace reports, direct-channel sales, exemptions, returns, and taxable New Jersey sales before filing.
What the late-filing penalty means in practice
The core penalty for filing a New Jersey Sales Tax return late is 5% of the unpaid tax balance for each month or fraction of a month the return remains late, up to 25%. A return that is only part of a month late can still count as one month for this calculation. The penalty is tied to the tax liability balance due as of the original due date, not simply to the date a seller eventually discovers the omission.
New Jersey also imposes a $100 delinquent-return penalty for each month or fraction of a month that the return is late. This fixed monthly charge is particularly important for low-tax or no-tax periods because a percentage penalty calculated against no unpaid tax may be zero, while the delinquent-return penalty can still apply.
If the Division sends a notice of delinquency and no return is filed within 30 days after that first notice, the 5% monthly late-filing calculation can apply to the total tax liability, subject to the 25% cap. Promptly filing a complete, accurate return is therefore important even if you cannot immediately pay the full amount.
Late payment and interest: what unpaid tax costs
New Jersey may impose a 5% late-payment penalty on the outstanding tax balance paid after the original due date. This charge is in addition to the consequences of filing late. A seller who files a return late and leaves tax unpaid can face the late-filing penalty, the $100 monthly delinquent-return penalty, the late-payment penalty, and interest.
The interest rate is 3 percentage points above the average predominant prime rate. It is charged for every month or part of a month the tax remains unpaid, beginning on the original due date and running through the payment date. At the end of each calendar year, unpaid tax, penalties, and interest become part of the balance on which interest is charged.
The exact dollar amount depends on the tax due, the original due date, the duration of the delinquency, applicable interest calculations, and whether the Division imposes penalties that its rules describe as discretionary. Do not estimate from a general percentage alone when deciding how to resolve a New Jersey balance; review the account and filing periods individually.
Is there a penalty when no New Jersey Sales Tax is due?
Yes, a no-tax quarter is not necessarily a no-filing quarter. New Jersey instructs registered businesses to file the quarterly ST-50 even if no tax was collected during that quarter. If there were no sales during the quarter, the return can be filed with zeros. Registration creates an ongoing filing responsibility until the account is properly updated or closed with the state.
If no tax is due, a percentage-based late-filing penalty calculated on unpaid tax may not produce a charge. However, New Jersey’s published Sales and Use Tax instructions state that a $100 penalty for each month or part of a month the return is late will be imposed. Therefore, skipping a zero return can still create an assessment.
Do not assume a marketplace’s collection activity removes your filing duty. The right result depends on how your New Jersey registration is set up and whether you made direct sales, marketplace sales, or both. Our article on Sales tax filing in New Jersey explains the operational filing considerations sellers should review before submitting returns.
When monthly sales tax payments are required
New Jersey quarterly filing does not always mean quarterly cash remittance only. A seller that collected more than $30,000 in New Jersey Sales and Use Tax during the preceding calendar year must file a monthly remittance statement, Form ST-51, for the first and/or second month of each calendar quarter when the tax due for that month exceeds $500. The relevant months are January and February, April and May, July and August, and October and November.
Both the monthly ST-51 remittance statement and the quarterly ST-50 return are due on the 20th day of the month following the period covered. A seller that collected $30,000 or less in New Jersey Sales and Use Tax during the preceding calendar year is not required to file a monthly remittance statement, regardless of the current month’s tax due.
These monthly remittances do not eliminate the quarterly return. Sellers subject to the monthly requirement must still file the ST-50 for each quarter and accurately account for the quarter’s sales, tax collected, adjustments, and remittances. A strong calendar and channel-level reconciliation process can prevent a quarterly filing from being missed after monthly activity has been reported.
Who must register for New Jersey Sales Tax
A business doing business in New Jersey that sells taxable products or services must register and indicate on its registration that it will collect Sales Tax. Out-of-state ecommerce sellers can also have a collection and remittance obligation under New Jersey’s economic nexus rules. A remote seller must register, collect, and remit if its gross revenue from sales delivered into New Jersey exceeds $100,000 during the current or prior calendar year, or if it makes 200 or more separate transactions for delivery into New Jersey during the current or prior calendar year.
Those thresholds are based on the state’s remote-seller rule and should be monitored across applicable channels rather than viewed as an individual-storefront issue. Physical presence and other in-state activity can also create a New Jersey tax obligation. Read Economic nexus in New Jersey and When does an out-of-state seller have to register in New Jersey? for a focused explanation of registration triggers.
Registration is not the end of the analysis. Sellers need to determine what sales are taxable, identify transactions handled by a marketplace facilitator, and establish filing procedures. Our Sales tax registration in New Jersey article covers the registration topic in more detail, while the New Jersey Sales Tax Guide 2026 for Amazon & Shopify Sellers provides broader seller-specific context.
How to file, pay, and resolve an overdue New Jersey sales tax balance
New Jersey directs businesses to file Sales and Use Tax returns and make payments electronically through the state’s tax filing and payment services. File the required ST-50 quarterly return, and file the ST-51 monthly remittance statement when your prior-year collection level and current-month balance require it. Retain the sales data, exemption support, marketplace facilitator reports, and payment confirmation that support each filing.
If a return is overdue, file it as soon as possible and pay as much of the balance as you can. Filing does not erase an unpaid balance, but leaving the return unfiled can allow late-filing charges to continue and can lead the Division to issue notices and assessments. Once tax remains unpaid, penalty and interest continue under the state’s rules, and the Division can pursue collection of the outstanding liability.
If you receive a billing notice, review the periods, reported sales, payments, and marketplace activity before responding. Do not ignore the notice because you believe a marketplace remitted tax: determine whether the assessed transactions were actually covered and whether the return reported them correctly. Cross-border sellers expanding across nearby states should also keep state rules separate; New Jersey’s thresholds and filing mechanics are not interchangeable with those discussed in Economic nexus in New York.
Can New Jersey waive late sales tax penalties?
New Jersey may waive all or part of a penalty if you can show reasonable cause for failing to file a return or pay tax when due. The state’s business abatement guidance says an abatement can be considered only after a penalty has been assessed and the taxpayer has been notified or billed. A waiver is not automatic merely because the business later files or pays.
Not sure how this applies to your business? We handle US sales tax registration, filing and remittance for ecommerce sellers as a fully managed service, for one fee. Book a free consultation and we will review your own position with you.
To request abatement, provide a written statement of the facts supporting reasonable cause and a signed declaration made under penalties of perjury. New Jersey provides an Abatement Request Form for Businesses that may be used instead of a separate written statement and declaration. Follow the instructions on the billing notice for where to send the request.
Focus the request on verifiable facts: the affected periods, what caused the failure, the steps taken to correct it, and supporting documentation. Penalty relief does not mean the underlying tax disappears. Interest and the availability of relief depend on the specific assessment and applicable rules, so the exact position depends on your circumstances—confirm with the state, or talk to us and we will check it for you.
New Jersey Sales Tax filing obligations and consequences for ecommerce sellers
| Situation | What New Jersey requires | Deadline | Potential consequence if missed |
|---|---|---|---|
| Regular quarterly Sales and Use Tax filing | File Form ST-50, including a zero return when registered but no tax was collected. | 20th day of the month after the quarter ends. | 5% late-filing penalty per month or part month, up to 25%, plus $100 per late month or part month; interest and possible late-payment penalty if tax is unpaid. |
| Monthly remittance requirement | File Form ST-51 for the first and/or second month of a quarter when prior-year New Jersey Sales and Use Tax collections exceeded $30,000 and the month’s tax due exceeds $500. | 20th day of the following month. | Late-filing, late-payment, and interest rules can apply to the overdue remittance. |
| Return filed on time, tax paid late | Submit the return and pay the balance shown as due. | Payment is due with the return, by the original due date. | A 5% late-payment penalty may be imposed on the outstanding tax balance, plus interest from the original due date. |
| No-tax filing period | File the required ST-50 with zero amounts if registered and no tax was collected. | Same quarterly due date. | The $100-per-month delinquent-return penalty can apply even where a percentage penalty based on unpaid tax is zero. |
| Remote seller nexus threshold met | Register, collect, remit, and file when New Jersey delivery sales exceed $100,000 or reach 200 or more separate transactions in the current or prior calendar year. | Registration and filing obligations depend on the seller’s facts and state requirements. | Failure to comply can result in tax assessments, penalties, interest, and collection activity. |
| Penalty assessed after a late filing or payment | Seek abatement only if reasonable cause can be substantiated. | After assessment and billing notice. | The Division may waive part or all of a penalty, but relief is not automatic and underlying tax remains due. |
Frequently asked questions
What is the penalty for filing sales tax late in New Jersey?
New Jersey assesses a late-filing penalty of 5% of the unpaid tax for each month or part of a month the return is late, up to 25% of the tax liability. The state also imposes a $100 penalty for each month or part of a month that the return is delinquent. If the Division’s first delinquency notice is ignored for more than 30 days, the percentage calculation can apply to the total tax liability, subject to the 25% cap.
How much is the late-payment penalty for New Jersey sales tax?
New Jersey may impose a late-payment penalty equal to 5% of the outstanding tax balance paid after the original due date. It is separate from the late-filing penalty. Interest also accrues on unpaid tax from the original due date until payment.
How long do you have to pay New Jersey sales tax after filing?
There is no separate payment grace period after filing. Payment is due by the same due date as the applicable return or monthly remittance statement—generally the 20th day of the month after the filing period. A payment made after the original due date can trigger a late-payment penalty and interest.
What happens if you file New Jersey sales tax late?
New Jersey can assess the 5% monthly late-filing penalty, up to 25%, and the $100 monthly delinquent-return penalty. If tax is also unpaid, the state may impose a 5% late-payment penalty and charge interest. Continued nonpayment can lead to billing notices, assessments, and collection activity.
Does New Jersey charge interest on late sales tax payments?
Yes. New Jersey charges interest at an annual rate 3 percentage points above the average predominant prime rate for every month or part of a month tax remains unpaid. Interest runs from the original due date to the date of payment and is compounded annually under the state’s published rules.
Can New Jersey sales tax penalties be waived?
New Jersey may waive part or all of a penalty when the taxpayer demonstrates reasonable cause for the late filing or payment. The request is considered after a penalty has been assessed and the taxpayer has been billed. Submit a written explanation and signed declaration, or use the state’s business abatement request form, with supporting facts and records.
What is the due date for New Jersey sales tax returns?
Quarterly Form ST-50 returns are generally due on the 20th day of the month following the end of the quarter. Required monthly Form ST-51 remittance statements are due on the 20th day of the following month. If the deadline falls on a Saturday, Sunday, or legal holiday, the due date is the next business day.
Is there a penalty for filing a New Jersey sales tax return with no tax due?
A timely zero return does not create a late penalty simply because no tax is due. However, registered sellers still must file required returns even when no tax was collected. If a zero return is filed late, New Jersey states that the $100 penalty for each month or part of a month the return is delinquent will be imposed.
Official sources
- https://www.nj.gov/treasury/taxation/pdf/pubs/sales/su7.pdf
- https://www.nj.gov/treasury/taxation/su_12.shtml
- https://www.nj.gov/treasury/taxation/remotesellers.shtml
- https://business.nj.gov/pages/register-for-taxes
- https://www.nj.gov/treasury/taxation/abatement-info.shtml
- https://www.nj.gov/treasury/taxation/pdf/regs/penalties.pdf
Related reading
- Economic nexus in New Jersey
- Sales tax filing in New Jersey
- Sales tax registration in New Jersey
- New Jersey Sales Tax Guide 2026 for Amazon & Shopify Sellers
- Our sales tax compliance services
Getting this handled
If you would rather not work this out yourself, that is what we do. We register you, file your returns and keep you compliant across every state where you have an obligation — one point of contact, one invoice. Talk to us about your situation.
Reviewed by Paul le Roux, CA(SA). Sales Tax Compliance USA handles US sales tax registration, filing and remittance for cross-border and domestic ecommerce sellers as a fully managed service.
This article is general information for educational purposes and does not constitute legal or tax advice. Sales tax rules change and depend on your specific facts. Consult a qualified tax professional about your own position.